At first, Claire expected that these thieves' original aim is Arvid because of all the stolen cattle and pigs, half of them belongs to him.
She thought someone had a grudge against him. So, that person stole the others in order to hide the purpose of harming Arvid and his family.
But, after hearing the story from the biggest victim, she changed her way of thinking and put more concentration on the missing case. Maybe, the thieves will also relax and attempt once again after they pretend to leave without any leads?
This is why she didn't go to any other victim's house and returned to the village chief's house to ask for a person who can take them to the spot where the dead body was found.
It took them three hours of trekking for everyone to reach the spot. They would have been able to reach faster but the villager who is showing the way isn't an Arcana Master like them and neither had great memory power. So, it is bound to consume time.